Microscope base and arm



FIG. 1 is a front perspective view of a microscope base and arm.

FIG. 2 is a right side elevational view thereof.

FIG. 3 is a left side elevational view thereof.

FIG. 4 is a front elevational view thereof.

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a top plan view thereof.

The broken lines shown represent unclaimed subject matter and form no part of the claimed design. The bottom side of the microscope base and arm forms no part of the claimed design. 

CLAIM We claim the ornamental design for a microscope base and arm, as shown and described. 